Youm-e-Takbir (Urdu: یوم تکبیر ‎, lit. The day of greatness) is celebrated as a national day in Pakistan on May 28 in commemoration of Chagai-I and Chagai-II when Pakistan detonated seven nuclear devices in response to India's five detonations of Pokhran-II in 1998, 17 days after the incident. Thus, Pakistan became the 7th World Nuclear Power and the 1st in the Muslim World